摘要随着科学技术的发展和社会经济水平的提高，人们更倾向于寻找一种更高更有效的生产方式以解放双手。自动化产品的出现节省了大量的人力资源，同时也解决了因场地因素对人们购物造成的制约，可满足人们的即时性要求，为人们的生活带来了巨大的便利。自动售货机、自动洗衣机、自动取件机等，渗透到人们生活的诸多方面，成为生活中的一部分。 73703

本文设计对象是生活中最常见的自动售饮料机，它是基于三菱PLC的控制系统。改变基于单片机控制的传统模式，大大降低了成本，提高抗干扰能力，简化硬件设计。同时，它还提高了自动售饮料机的可靠性和执行效率，使系统维护变得更简单、方便。本文主要包括计币系统、比较系统、选择系统、出货系统、退币系统、显示系统，通过梯形图、指令语句来编写程序。

本设计采用GX Developer软件编写程序并进行仿真，可实现投币、选择、购买、找零等基本功能。73703

该论文有图19幅，表2个，参考文献27篇。

毕业论文关键字：自动售饮料机  PLC  梯形图  GX Developer软件 

Beverage Vending Machines Control System Based on  PLC

Abstract With the development of science technology and the improvement of the socioeconomic level, people are more likely to find a higher and more efficient way of production to free their hands。 The emergence of automation products save a lot of human resources。 At the same time, it also solves the At the same time, it also solves the restrictions on people's shopping caused by the site factors 。It can meet people's immediate needs and bring great convenience to people's life。 Vending machines, automatic washing machines, and automatic fetching machine are penetrate into many aspects of people's life, and become a part of life。 

The object of this design is the most common beverage vending machine in life, which is based on the Mitsubishi PLC control system。 Changing the traditional mode control based on single chip microcomputer will greatly reduce the cost, improve the anti interference ability and simplified the hardware design。 At the same time, it improves the reliability and efficiency of beverage vending machines to make the system maintenance becomes more simple and convenient。 This design mainly includes the currency system, the comparison system, the choice system, the delivery system, the withdrawal system and the display system 。The design is programmed by ladder diagram and instruction。

This design uses the GX Developer software to program and carry on the simulation。 It can realize the basic functions of coin-operated, selecting, purchasing, change and so on。

This paper has 19 figures, 2 tables and 27 references 。

Key words: beverage vending machines  PLC  ladder diagram  GX Developer software

目  录

摘要 I

Abstract II

目录 III

图清单 IV

表清单 V

1 绪论 1

1。1 引言 1

1。2 研究背景 2

1。3 自动售饮料机的发展现状 2

1。4 自动售饮料机的前景分析 3

1。5 本文设计的主要内容 3

2 PLC介绍 5

2。1 PLC概述 5

2。2 PLC的产生